a = b: Difference between revisions

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m (Text replacement - "numbers" to "Numbers")
 
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|descr= Assigns the result of expression on the right to the variable on the left. Technically this is not a command and it is not listed in [[supportInfo]]; this is more of a compiler instruction.
|descr= Assigns the result of expression on the right to the variable on the left. Technically this is not a command and it is not listed in [[supportInfo]]; this is more of a compiler instruction.
{{Feature | important |The following structure is invalid: {{ic|a {{=}} b {{=}} c {{=}} 4;}}}}
{{Feature|important|The following structure is invalid: <sqf inline>a = b = c = 4;</sqf>.}}


|s1= variable [[a = b|=]] value
|s1= variable [[a = b|=]] value
Line 35: Line 35:
|p2= value: [[Anything]]
|p2= value: [[Anything]]


|r1=[[Nothing]] {{Feature|important|The returned value is not equivalent to [[nil]]. See {{HashLink|#Notes}} below for additional information.}}
|r1= [[Nothing]] {{Feature|important|The returned value is not equivalent to [[nil]]. See {{Link|#Notes}} below for additional information.}}


|x1= <code>_value [[a = b|=]] 5</code>  
|x1= <sqf>_value = 5;</sqf>  


|x2= <code>_mygroup [[a = b|=]] [[group]] [[player]]</code>
|x2= <sqf>_mygroup = group player;</sqf>


|x3= <code>_greeting [[a = b|=]] "Hello!"</code>
|x3= <sqf>_greeting = "Hello!";</sqf>


|x4= <code>[[private]] _enemyTank [[a = b|=]] myTank1</code>
|x4= <sqf>private _enemyTank = myTank1;</sqf>


|seealso= [[Operators]]
|seealso= [[Operators]]
}}
}}


<dl class="command_description">
{{Note
|user= Kronzky
|timestamp= 20061215052700
|text= A conditional assignment can be done via the following syntax:
<sqf>_msg = if (alive player) then {"you're alive"} else {"you're dead"}</sqf>
}}


<dt></dt>
{{Note
<dd class="notedate">Posted on December 15, 2006 - 05:27</dd>
|user= Alef
<dt class="note">[[User:Kronzky|Kronzky]]</dt>
|timestamp= 20090622162700
<dd class="note">A conditional assignment can be done via the following syntax:
|text= It's possible to assign to [[Number]]s. Numbers values are not changed. Useful instead of assigning to ''nul'' or ''nil'' when a result is of no use.
<code>_msg <nowiki>=</nowiki> if (alive player) then {"you're alive"} else {"you're dead"}</code>
<sqf>[player] execVM "myScript.sqf"</sqf>
<dd class="notedate">Posted on June 22, 2009 - 16:27</dd>
}}
<dt class="note">[[User:Alef|Alef]]</dt>
<dd class="note">It's possible to assign to [[Number|numbers]]. Numbers values are not changed. Useful instead of assigning to ''nul'' or ''nil'' when a result is of no use.
<code>0 <nowiki>=</nowiki> [player] execVM "myScript.sqf"</code>
</dd>


<dt></dt>
{{Note
<dd class="notedate">Posted on November 9, 2016 - 00:29 (UTC)</dd>
|user= Dedmen
<dt class="note">[[User:Dedmen|Dedmen]]</dt>
|timestamp= 20161109002900
<dd class="note">
|text= This operator actually does not return a Nil. It really returns pure Nothing. Not Nil Nothing.<br>
This operator actually does not return a Nil. It really returns pure Nothing. Not Nil Nothing.<br>
This can cause problems. For example:
This can cause problems. For example:
<code>_var1 = call {
<sqf>
_var1 = call {
_var2 = "";
_var2 = "";
};</code>
};
The return value of the "call" is the return value of the "<nowiki>=</nowiki>" operator.<br>
</sqf>
If it were a nil then of cause "_var <nowiki>=</nowiki> nil;" would work just fine.<br>
The return value of the "call" is the return value of the "{{=}}" operator.<br>
But in reality this causes a "Generic Error in expression" because you can't assign pure Nothing to anything.<br>
If it were a nil then of cause "_var {{=}} nil;" would work just fine.<br>
</dd>
But in reality this causes a "Generic Error in expression" because you can't assign pure Nothing to anything
 
}}
</dl>

Latest revision as of 14:49, 8 November 2023

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Hover & click on the images for description

Description

Description:
Assigns the result of expression on the right to the variable on the left. Technically this is not a command and it is not listed in supportInfo; this is more of a compiler instruction.
⚠
The following structure is invalid: a = b = c = 4;.
Groups:
Variables

Syntax

Syntax:
variable = value
Parameters:
variable: Anything - see Identifier
value: Anything
Return Value:
Nothing
⚠
The returned value is not equivalent to nil. See Notes below for additional information.

Examples

Example 1:
_value = 5;
Example 2:
_mygroup = group player;
Example 3:
_greeting = "Hello!";
Example 4:
private _enemyTank = myTank1;

Additional Information

See also:
Operators

Notes

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Kronzky - c
Posted on Dec 15, 2006 - 05:27 (UTC)
A conditional assignment can be done via the following syntax:
_msg = if (alive player) then {"you're alive"} else {"you're dead"}
Alef - c
Posted on Jun 22, 2009 - 16:27 (UTC)
It's possible to assign to Numbers. Numbers values are not changed. Useful instead of assigning to nul or nil when a result is of no use.
[player] execVM "myScript.sqf"
Dedmen - c
Posted on Nov 09, 2016 - 00:29 (UTC)
This operator actually does not return a Nil. It really returns pure Nothing. Not Nil Nothing.
This can cause problems. For example:
_var1 = call { _var2 = ""; };
The return value of the "call" is the return value of the "=" operator.
If it were a nil then of cause "_var = nil;" would work just fine.
But in reality this causes a "Generic Error in expression" because you can't assign pure Nothing to anything
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